Spectrometry of X-ray Beams Used for Calibrations

Summary:

Spectrometry measurements in the x-ray calibration ranges have been undertaken using a high-resolution HPGe detector both in the direct beam and at 90 % using a Compton-scatter spectrometer.

Description:

Pulse-height distributions were obtained for all the NIST and International Organization for Standardization (ISO) beams produced by the NIST 100 keV and 300 keV x-ray generators, and have been unfolded and are in the process of being tabulated. This was performed for a number of narrow-spectrum beam qualities (shown below) and used to calibrate a wavelength-dispersive crystal x-ray spectrograph used by Lawrence Livermore National Laboratory (LLNL) to diagnose laser-to-x-ray conversion efficiencies of laser-produced plasmas.